The event you're looking at is actually in south eastern Minnesota, some distance from Minneapolis. It's a very nice club with relaxed, fun events. The site is a smallish driver training facility with a particularly nice round-about section. I've had fun running with them, but it's going to be a drive from the Minneapolis area.
If you're going to be in the Twin Cities area, you might want to head on over to www.mnautox.com and check out the calendar/forum. There is a "MOWOG" autocross event there that same weekend at Dakota County Technical College. This will be a big event with over 150 entries. Many of them will be warming up for Nationals that weekend. The site is also a driver training facility, but much larger than the one in Winona. Expect 6 runs of more than 50 seconds. Speeds will likely be comparable to any other large autox course. If you do decide to go, make sure you pre-register the day registration opens. They usually sell out in one or two days.